Allow setting the name of an object at any time...

...in a thread-safe manner. However, this is really only usable for
informational purpose (debugging the object tree).
vlc_object_find_name() remains broken.

include/vlc_objects.h

@@ -83,7 +83,7 @@ VLC_EXPORT( void *, __vlc_object_hold, ( vlc_object_t * ) );
 VLC_EXPORT( void, __vlc_object_release, ( vlc_object_t * ) );
 VLC_EXPORT( vlc_list_t *, __vlc_list_children, ( vlc_object_t * ) );
 VLC_EXPORT( void, vlc_list_release, ( vlc_list_t * ) );
-VLC_EXPORT( const char *, vlc_object_get_name, ( const vlc_object_t * ) ) LIBVLC_USED;
+VLC_EXPORT( char *, vlc_object_get_name, ( const vlc_object_t * ) ) LIBVLC_USED;
 #define vlc_object_get_name(o) vlc_object_get_name(VLC_OBJECT(o))
 
 /*}@*/

modules/gui/ncurses.c

@@ -1453,10 +1453,13 @@ static void MainBoxWrite( intf_thread_t *p_intf, int l, int x, const char *p_fmt
 
 static void DumpObject( intf_thread_t *p_intf, int *l, vlc_object_t *p_obj, int i_level )
 {
-    const char *psz_name = vlc_object_get_name( p_obj );
+    char *psz_name = vlc_object_get_name( p_obj );
     if( psz_name )
+    {
         MainBoxWrite( p_intf, (*l)++, 1 + 2 * i_level, "%s \"%s\" (%p)",
                 p_obj->psz_object_type, psz_name, p_obj );
+        free( psz_name );
+    }
     else
         MainBoxWrite( p_intf, (*l)++, 1 + 2 * i_level, "%s (%o)",
                 p_obj->psz_object_type, p_obj );

modules/gui/qt4/dialogs/messages.cpp

@@ -278,11 +278,14 @@ void MessagesDialog::buildTree( QTreeWidgetItem *parentItem,
     else
         item = new QTreeWidgetItem( modulesTree );
 
-    const char *name = vlc_object_get_name( p_obj );
+    char *name = vlc_object_get_name( p_obj );
     if( name != NULL )
+    {
         item->setText( 0, qfu( p_obj->psz_object_type ) + " \"" +
                        qfu( name ) + "\" (" +
                        QString::number((uintptr_t)p_obj) + ")" );
+        free( name );
+    }
     else
         item->setText( 0, qfu( p_obj->psz_object_type ) + " (" +
                        QString::number((uintptr_t)p_obj) + ")" );

src/misc/objects.c

@@ -241,26 +241,35 @@ void __vlc_object_set_destructor( vlc_object_t *p_this,
     vlc_spin_unlock( &p_priv->ref_spin );
 }
 
+static vlc_mutex_t name_lock = VLC_STATIC_MUTEX;
+
 #undef vlc_object_set_name
 int vlc_object_set_name(vlc_object_t *obj, const char *name)
 {
     vlc_object_internals_t *priv = vlc_internals(obj);
+    char *newname = name ? strdup (name) : NULL;
+    char *oldname;
 
-    /* Object must be named before it is attached (or never) */
-    assert(obj->p_parent == NULL);
-    assert(priv->i_children == 0);
+    vlc_mutex_lock (&name_lock);
+    oldname = priv->psz_name;
+    priv->psz_name = newname;
+    vlc_mutex_unlock (&name_lock);
 
-    free(priv->psz_name);
-    priv->psz_name = name ? strdup(name) : NULL;
+    free (oldname);
     return (priv->psz_name || !name) ? VLC_SUCCESS : VLC_ENOMEM;
 }
 
 #undef vlc_object_get_name
-const char *vlc_object_get_name(const vlc_object_t *obj)
+char *vlc_object_get_name(const vlc_object_t *obj)
 {
     vlc_object_internals_t *priv = vlc_internals(obj);
+    char *name;
+
+    vlc_mutex_lock (&name_lock);
+    name = priv->psz_name ? strdup (priv->psz_name) : NULL;
+    vlc_mutex_unlock (&name_lock);
 
-    return priv->psz_name;
+    return name;
 }
 
 /**
@@ -478,9 +487,13 @@ void * __vlc_object_find( vlc_object_t *p_this, int i_type, int i_mode )
 
 static int objnamecmp(const vlc_object_t *obj, const char *name)
 {
-    if (!vlc_object_get_name(obj))
+    char *objname = vlc_object_get_name(obj);
+    if (objname == NULL)
         return INT_MIN;
-    return strcmp( vlc_object_get_name(obj), name );
+
+    int ret = strcmp (objname, name);
+    free (objname);
+    return ret;
 }
 
 #undef vlc_object_find_name
@@ -607,9 +620,8 @@ void __vlc_object_release( vlc_object_t *p_this )
             {
                 /* We are leaking this object */
                 fprintf( stderr,
-                         "ERROR: leaking object (%p, type:%s, name:%s)\n",
-                         leaked, leaked->psz_object_type,
-                         vlc_object_get_name(leaked) );
+                         "ERROR: leaking object (%p, type:%s)\n",
+                         leaked, leaked->psz_object_type );
                 /* Dump object to ease debugging */
                 vlc_object_dump( leaked );
                 fflush(stderr);
@@ -1090,10 +1102,11 @@ static void PrintObject( vlc_object_t *p_this, const char *psz_prefix )
 
     int canc = vlc_savecancel ();
     memset( &psz_name, 0, sizeof(psz_name) );
-    if( vlc_object_get_name(p_this) )
+    char *name = vlc_object_get_name(p_this);
+    if( name )
     {
-        snprintf( psz_name, 49, " \"%s\"",
-                  vlc_object_get_name(p_this) );
+        snprintf( psz_name, 49, " \"%s\"", name );
+        free( name );
         if( psz_name[48] )
             psz_name[48] = '\"';
     }